London: A pro-ISIS hacker group has placed nearly 8,000 Americans on its longest ‘kill list’ that also includes names of Canadians, Australians and Europeans, a British media report said on Friday.

The pro-ISIS United Cyber Caliphate hacker group released a list of 8,318 people, including their addresses and email contact details, on a secretive messaging app service.

It urged its supporters to “follow” those listed – and “kill them strongly to take revenge for Muslims”, Daily Mirror reported.

It is one of the longest kill lists any ISIS-affiliated group has distributed to date and reportedly includes the names of 7,848 Americans, 312 Canadians, 39 Britons and 69 Australians.

The rest of the targets listed are reported to be from a variety of nations including Belgium, Brazil, China, Estonia, France, Germany, Greece, Guatemala, Indonesia, Ireland, Israel, Italy, Jamaica, New Zealand, Trinidad and Tobago, South Korea and Sweden.

They are mostly military or government workers or people in the public eye, like royalty or celebrities.

The list, written in both English and Arabic, was uncovered by the media group Vocativ, which specialises in investigating the hidden side of the web.

It discovered it on a messaging app service called Telegram earlier this week. Vocativ has refused to share further details of those named on the list.

According to a report by US intelligence firm Flashpoint, the United Cyber Caliphate was formed in April 2015 after a merger of several radical Islamic hacking groups.